In the end, he chose to die - and died with the grimoire.
He handed over the source of evil and himself to the God of Death.
Sometimes I wonder if I should write such an ending, but then I understand.
No one can prevent such death, not even me.
We can live without life, but we cannot live without hope.
We can give up all desires, except love.
We can bury everything with our own hands, but we must never lose faith.
Luo Fei is not a hero, he just doesn't want to give up...